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Mount Shishaldin

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several weeks. The summit cone partially collapsed on November 25, producing a pyroclastic flow down the northwest side of the volcano and a new lava flow. On December 12, a short-lived explosion from Shishaldin expelled an ash cloud to 20,000–25,000 ft (6,100–7,600 m). During late December, eruptive activity continued with lava flows and low-level explosive activity at the summit. On January 3, 2020, seismicity led to an ash cloud eruption that reached as high as 27,000 ft (8,200 m). Another large ash cloud was emitted on January 19, 2020. This event ended shortly afterwards with an abrupt end in seismicity. The lava flows emitted during the eruptive events have cut deep channels in the snow and ice mantle of the volcano's north slope.
398:. It is the highest mountain peak of the Aleutian Islands and rises about 8,000 m (26,000 ft) from the bottom of the Aleutian Trench 140 mi (230 km) south of the volcano. The volcano's topographic contour lines are nearly perfect circles above 6,500 ft (2,000 m). The lower north and south slopes are somewhat steeper than the lower eastern and western slopes. Only on the volcano's west flank between about 3,500 to 6,500 ft (1,100 to 2,000 m) are small areas of rough topography which are remnants of an older collapsed volcano upon which Shishaldin is built. The volcano is the westernmost of three large 572: 603: 536: 524: 180: 548: 500:
2,500 ft (760 m) on the east side after a four day hike and ski trip from the village of False Pass. As they climbed the cone, they noted "we could never believe it was so tall since the summit always looked 'so close'. Yet it never seemed to get any closer!" It took that group about 8 hours to climb to the top. Shishaldin is a popular ski descent (6,000 ft (1,800 m) vertical) for local climbers (of whom there are few). Due to its remoteness, Shishaldin is not often climbed by outsiders.
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A new period of activity started in July 2019 with incandescence observed in the summit crater during a time of increased seismic activity. On July 23, an active lava lake and minor spattering within the summit crater was observed. A new lava effusion event began on October 13 advancing over the next
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and shield. Remnants of the older ancestral volcano are exposed on the west and northeast sides at 4,900 to 5,900 ft (1,500 to 1,800 m) elevation. The Shishaldin edifice contains about 300 km (72 cu mi) of material. A very steady steam plume rises from its small summit crater
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After more than two years of dormancy, another eruptive cycle began and on 14 July 2023, the volcano emitted ash plumes up to 40,000 ft (12,000 m) high after several explosions at the summit. Fourteen significant explosive events occurred at Shishaldin between 12 July and 3 November 2023.
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possible eruptions) in Alaska, but half of the eruptions are unconfirmed. Recent, well-documented eruptions were in 1995–96 and 1999. Since the 1999 eruption, it has maintained seismic activity, typically having very low-magnitude volcanic earthquakes (most are below magnitude 1) every 1–2 minutes.
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This volcano has had many recorded eruptions during the 19th and 20th centuries, and a couple of reports of volcanic activity in the area during the 18th century may have referred to Shishaldin as well. Therefore, the volcano's entire recorded history is spotted with reports of activity. AVO has 24
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The upper 6,600 ft (2,000 m) is almost entirely covered by glacial snow and ice. In all, Shishaldin's glacial shield covers about 35 sq mi (91 km). It is flanked to the northwest by 24 monogenetic parasitic cones, an area blanketed by massive lava flows. The Shishaldin cone
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Orr, T.R., Cameron, C.E., Dietterich, H.R., Dixon, J.P., Enders, M.L., Grapenthin, R., Iezzi, A.M., Loewen, M.W., Power, J.A., Searcy, C., Tepp, G., Toney, L., Waythomas, C.F., and Wech, A.G., 2023, 2019 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory:
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1, snow up to 40 degree slope), it is possible that an earlier ascent occurred, either by native Aleuts, Russians, or other visitors. Shishaldin is rather unique in that its appearance changes very little to a climber during an ascent. A group climbing Shishaldin in May, 2005 set a base camp at
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During this period of non-eruptive seismic activity, it has been puffing steam, with puffs also occurring about every 1–2 minutes. There were reports in 2004 of small quantities of ash being emitted with the steam. In 2014, a low-level effusive eruption cycle started which lasted into 2016.
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After the November 3 explosive event, much smaller explosions, steam and gas emissions and collapse events around the summit crater rim occurred frequently for about a week, By January 2024, only minor steam emissions and small events deep in the summit crater continued.
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Power, John A.; Haney, Mathew M.; Botnick, Stephen M.; Dixon, James P.; Fee, David; Kaufman, A. Max; Ketner, Dane M.; Lyons, John J.; Parker, Tom; Paskievitch, John F.; Read, Cyrus W.; Searcy, Cheryl; Stihler, Scott D.; Tepp, Gabrielle; Wech, Aaron G. (2020-03-01).
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which is about 500 ft (150 m) across and slightly breached along the north rim. In appearance, the volcano can vary from nearly completely white to almost all black, depending on the occurrence of ashfall deposits.
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The Alaska Volcano Observatory monitors the volcano for more hazardous activity with seismometers and satellite images. Due to the remote location of the volcano, visual observations are rare.
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The first recorded ascent of Shishaldin was in 1932, by G. Peterson and two companions. Given the straightforward nature of the climbing (
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confirmed eruptions at Shishaldin, making it the volcano with the third most confirmed eruptions (after
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is less than 10,000 years old and is constructed on a glacially eroded remnant of an ancestral
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Wood, Charles A.; Kienle, Jurgen, eds. (1992). "Shishaldin, Eastern Aleutian Islands".
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P., Stelling; J., Beget; C., Nye; J., Gardner; J., Devine; R., George (2002-12-01).
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The geology and petrology of Shishaldin Volcano, Unimak Island, Aleutian Arc, Alaska
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Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
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U.S. Geological Survey Scientific Investigations Report 2023–5039, 64 p.,
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The 126 most prominent summits of the United States of America
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along an east–west line in the eastern half of Unimak Island.
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Alaska Volcano Observatory, Volcano Information -- Shishaldin
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Shishaldin (left) and Isanotski volcanoes on Unimak Island.
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May 16, 1932 by G. Peterson et al. (first recorded ascent)
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An overhead view of the volcano from November 24, 2013
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Caplan-Auerbach, Jacqueline; Petersen, Tanja (2005).
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Volcanoes of North America: United States and Canada
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Shishaldin Volcano on the west end of Unimak Island.
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1889: 1886: 1885: 1884: 1881: 1879: 1876: 1874: 1871: 1869: 1866: 1865: 1863: 1861: 1857: 1852: 1851: 1845: 1841: 1837: 1830: 1825: 1823: 1818: 1816: 1811: 1810: 1807: 1794: 1791: 1789: 1786: 1784: 1781: 1779: 1776: 1774: 1771: 1769: 1768:Mount Augusta 1766: 1764: 1761: 1759: 1756: 1754: 1751: 1749: 1748:Mount Gareloi 1746: 1744: 1741: 1739: 1736: 1734: 1731: 1729: 1728:Mount Deborah 1726: 1724: 1721: 1719: 1716: 1714: 1711: 1709: 1706: 1704: 1701: 1699: 1696: 1694: 1691: 1689: 1686: 1684: 1681: 1679: 1676: 1674: 1671: 1669: 1666: 1664: 1663:Mount Steller 1661: 1659: 1658:Bearhole Peak 1656: 1654: 1651: 1649: 1646: 1644: 1641: 1639: 1638:Mount Foresta 1636: 1634: 1631: 1629: 1626: 1624: 1623:Snowshoe Peak 1621: 1619: 1616: 1614: 1613:Mount Russell 1611: 1609: 1606: 1604: 1601: 1599: 1598:Mount Seattle 1596: 1594: 1591: 1589: 1586: 1584: 1581: 1579: 1578:McDonald Peak 1576: 1574: 1571: 1569: 1566: 1564: 1561: 1559: 1556: 1554: 1551: 1549: 1546: 1544: 1541: 1539: 1536: 1534: 1531: 1529: 1526: 1524: 1521: 1519: 1516: 1514: 1511: 1509: 1506: 1504: 1501: 1499: 1498:Hanagita Peak 1496: 1494: 1491: 1489: 1486: 1484: 1481: 1479: 1476: 1474: 1471: 1469: 1466: 1464: 1463:Mount Igikpak 1461: 1459: 1456: 1454: 1451: 1449: 1446: 1444: 1441: 1439: 1436: 1434: 1431: 1429: 1426: 1424: 1421: 1419: 1418:Mount Douglas 1416: 1414: 1411: 1409: 1406: 1404: 1403:Mount Neacola 1401: 1399: 1396: 1394: 1391: 1389: 1386: 1384: 1381: 1379: 1376: 1374: 1371: 1369: 1366: 1364: 1361: 1359: 1356: 1354: 1351: 1349: 1348:Mount Crillon 1346: 1344: 1341: 1339: 1338:Mount Foraker 1336: 1334: 1331: 1329: 1328:Mount Kimball 1326: 1324: 1321: 1319: 1316: 1314: 1311: 1309: 1308:Mount Sanford 1306: 1304: 1301: 1299: 1296: 1294: 1293:Mount Olympus 1291: 1289: 1286: 1284: 1281: 1279: 1278:Mount Hubbard 1276: 1274: 1271: 1269: 1266: 1264: 1261: 1259: 1256: 1254: 1251: 1249: 1246: 1244: 1243:Mount Torbert 1241: 1239: 1236: 1234: 1231: 1229: 1226: 1224: 1221: 1219: 1216: 1214: 1211: 1209: 1208:Mount Whitney 1206: 1204: 1201: 1199: 1196: 1194: 1191: 1189: 1186: 1184: 1181: 1179: 1178:Mount Rainier 1176: 1174: 1171: 1169: 1166: 1165: 1161: 1157: 1150: 1145: 1143: 1138: 1136: 1131: 1130: 1127: 1120: 1116: 1113: 1109: 1106: 1104: 1101: 1098: 1094: 1090: 1086: 1082: 1078: 1074: 1069: 1065: 1061: 1060: 1055: 1051: 1050: 1046: 1038: 1032: 1028: 1021: 1019: 1015: 1010: 1006: 1002: 998: 994: 990: 986: 982: 978: 970: 967: 964: 957: 954: 949: 945: 941: 937: 933: 929: 925: 918: 915: 910: 906: 902: 898: 894: 890: 886: 879: 876: 871: 867: 863: 859: 855: 851: 847: 843: 839: 832: 829: 824: 818: 814: 810: 803: 801: 797: 792: 786: 782: 778: 771: 768: 757: 753: 747: 744: 740: 735: 732: 726: 721: 717: 714: 710: 707: 706: 702: 698: 695: 693: 690: 684: 681: 680: 679: 676: 675: 674: 671: 670: 666: 660: 655: 652: 641: 638: 637:Alaska portal 627: 624: 613: 610: 599: 594: 585: 580: 573: 568: 561: 556: 549: 544: 537: 532: 525: 520: 513: 508: 503: 501: 498: 490: 488: 485: 481: 477: 474: 470: 466: 457: 455: 453: 449: 445: 444: 439: 438: 433: 425: 423: 421: 417: 412: 409: 403: 401: 397: 396:United States 393: 389: 385: 384:Unimak Island 381: 375: 342: 338: 329: 325: 321: 313: 304: 300: 298: 296:Easiest route 292: 288: 286: 282: 277: 273: 271: 270:Last eruption 267: 264: 261: 259: 255: 250: 247: 246:Stratovolcano 244: 242: 241:Mountain type 238: 233: 229: 226: 224: 220: 217: 214: 212: 206: 198: 194: 193:Unimak Island 174: 164: 159: 154: 126: 124: 120: 113: 110: 107: 104: 101: 98: 95: 92: 91: 89: 87: 83: 79: 77: 73: 69: 67: 63: 59: 57: 53: 48: 41: 36: 31: 19: 2524: 2479:Copper River 2456:Census Areas 2100:Southcentral 2002:Homelessness 1977:Demographics 1848: 1743:Mount Lemmon 1693:Bashful Peak 1678:Mount Miller 1668:Mount Stuart 1633:Hayford Peak 1588:South Sister 1543:Isthmus Peak 1533:Deseret Peak 1433:De Long Peak 1413:Mount Graham 1363:Gannett Peak 1333:Mount Griggs 1323:Glacier Peak 1318:Wheeler Peak 1233:Mount Elbert 1222: 1218:Mount Shasta 1118: 1080: 1076: 1057: 1054:"Shishaldin" 1026: 984: 980: 969: 956: 931: 927: 917: 892: 888: 878: 845: 841: 831: 808: 776: 770: 759:. Retrieved 755: 746: 734: 719: 712: 497:Alaska Grade 494: 486: 482: 478: 472: 461: 451: 447: 442: 441: 436: 435: 429: 413: 404: 340: 336: 335: 285:First ascent 263:Aleutian Arc 210:Parent range 197:Alaska, U.S. 2368:Unorganized 2333:North Slope 2283:Bristol Bay 2058:North Slope 2007:LGBT rights 1900:Delegations 1888:Earthquakes 1788:Miller Peak 1773:Copper Peak 1733:Necons Peak 1723:Lassen Peak 1713:Tetlin Peak 1698:Ibapah Peak 1673:Blanca Peak 1548:Frosty Peak 1523:Mount Ellen 1478:Truuli Peak 1443:Mount Peale 1393:Grand Teton 1273:Mount Adams 1238:Mount Baker 1193:Mount Hayes 756:www.nps.gov 148: / 136:163°58′03″W 123:Coordinates 2547:Categories 2484:Dillingham 2343:Petersburg 2215:Petersburg 2205:North Pole 2170:Dillingham 1895:Government 1778:Mount Bear 1763:Mount Eddy 1758:Stony Peak 1618:Mount Nebo 1608:Pikes Peak 1593:Devils Paw 1568:Puʻu Kukui 1558:Crazy Peak 1553:Pilot Peak 1488:Borah Peak 1468:Snow Tower 1453:Dewey Peak 1408:Kings Peak 1383:Mount Drum 1378:Mount Bona 1358:Cloud Peak 1303:Mount Hood 1298:Mount Cook 1283:Mount Isto 1083:(4): 365, 761:2019-03-20 727:References 448:Shishaldin 319:Designated 133:54°45′21″N 66:Prominence 18:Shishaldin 2278:Anchorage 2255:Utqiaġvik 2185:Ketchikan 2135:Fairbanks 2130:Anchorage 2105:Southeast 2063:Southwest 1992:Elections 1987:Education 1878:Geography 1853:(capital) 1708:Kawaikini 1643:Star Peak 1353:Mauna Loa 1213:Haleakalā 1173:Mauna Kea 1009:0895-0695 870:0258-8900 452:Шишалдина 390:chain of 252:Volcanic 161:Geography 76:Isolation 56:Elevation 2494:Kusilvak 2358:Wrangell 2265:Boroughs 2250:Wrangell 2235:Unalaska 2230:Soldotna 2195:Kotzebue 2080:Interior 2038:The Bush 2017:Politics 1997:Gun laws 1962:Cannabis 1957:Abortion 1932:Wildlife 1718:Arc Dome 595:See also 491:Climbing 458:Activity 279:Climbing 223:Topo map 2474:Chugach 2363:Yakutat 2353:Skagway 2245:Wasilla 2165:Cordova 2031:Regions 1982:Economy 1950:Society 1922:Symbols 1907:History 1883:Geology 1873:Climate 1793:Kamakou 1085:Bibcode 989:Bibcode 936:Bibcode 897:Bibcode 850:Bibcode 504:Gallery 443:Sisagux 394:in the 386:in the 380:volcano 235:Geology 86:Listing 2469:Bethel 2303:Juneau 2298:Haines 2288:Denali 2240:Valdez 2220:Seward 2210:Palmer 2190:Kodiak 2160:Bethel 2140:Juneau 2043:Arctic 2022:Sports 1917:People 1860:Topics 1850:Juneau 1840:Alaska 1168:Denali 1033:  1007:  868:  819:  787:  469:Pavlof 465:Akutan 437:Sisquk 432:Aleuts 392:Alaska 2348:Sitka 2225:Sitka 2180:Kenai 2175:Homer 1972:Crime 1912:Music 1868:Index 1836:State 408:somma 339:, or 102:115th 2499:Nome 2200:Nome 1031:ISBN 1005:ISSN 866:ISSN 817:ISBN 785:ISBN 467:and 430:The 426:Name 322:1967 274:2023 258:belt 228:USGS 114:10th 108:20th 96:28th 1838:of 1093:doi 1081:151 997:doi 944:doi 932:145 905:doi 893:166 858:doi 813:439 473:and 440:or 382:on 254:arc 2549:: 1091:, 1079:, 1062:. 1056:. 1017:^ 1003:. 995:. 985:91 983:. 979:. 942:. 930:. 926:. 903:. 891:. 887:. 864:. 856:. 846:64 844:. 840:. 815:. 799:^ 783:. 781:48 754:. 371:ən 195:, 1828:e 1821:t 1814:v 1148:e 1141:t 1134:v 1114:) 1110:( 1095:: 1087:: 1066:. 1039:. 1011:. 999:: 991:: 950:. 946:: 938:: 911:. 907:: 899:: 872:. 860:: 852:: 825:. 793:. 764:. 374:/ 368:d 365:l 362:æ 359:ʃ 356:ˈ 353:ɪ 350:ʃ 347:/ 343:( 256:/ 20:)

Index

Shishaldin

Elevation
Prominence
Isolation
Listing
Highest ocean islands
World prominent peaks
North America prominent
North America isolated peak
Coordinates
54°45′21″N 163°58′03″W / 54.75583°N 163.96750°W / 54.75583; -163.96750
Mount Shishaldin is located in Alaska
Unimak Island
Alaska, U.S.
Parent range
Aleutian Range
Topo map
USGS
Mountain type
Stratovolcano
arc
belt
Aleutian Arc
Last eruption
First ascent
Easiest route
U.S. National Natural Landmark
/ʃɪˈʃældən/
volcano

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